Cardiovascular System: Blood Vessel and Circulation
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Questions and Answers

What is the main function of the cardiovascular system?

  • Distributing oxygen and nutrients only
  • Assisting in digestion and waste removal
  • Carrying blood, nutrients, and hormones throughout the body (correct)
  • Transporting blood to the brain and back to the heart

Which structure forms a closed system of tubes to carry blood?

  • Blood vessels (correct)
  • Coronary arteries
  • Alveoli
  • Bronchi

In which blood vessel does the exchange occur between blood and tissue fluid?

  • Veins
  • Capillaries (correct)
  • Arteries
  • Venules

What is the main function of arteries?

<p>Carry oxygen-rich blood away from the heart (A)</p> Signup and view all the answers

What substances are transported by the circulatory system?

<p>Hormones, antibodies, WBC, enzymes, clotting factors, gases, waste substances, and more (B)</p> Signup and view all the answers

How does the circulatory system help regulate blood pressure?

<p>By maintaining fluid balance and adjusting vessel diameter (C)</p> Signup and view all the answers

What type of blood do veins carry?

<p>Oxygen-poor blood (C)</p> Signup and view all the answers

What is the function of the tunica media in blood vessels?

<p>Control blood flow to different body regions (A)</p> Signup and view all the answers

What is the main function of arterioles?

<p>Transport blood from small arteries to capillaries (B)</p> Signup and view all the answers

What is the main function of capillaries?

<p>Allow for exchange of nutrients and waste products (C)</p> Signup and view all the answers

What is the composition of venules?

<p>Only composed of tunica intima (A)</p> Signup and view all the answers

What characterizes elastic arteries?

<p>Have elastic recoil preventing blood pressure from falling down when the ventricles are relaxed (C)</p> Signup and view all the answers

What is the function of muscular arteries?

<p>Enable control of blood flow to different body regions (C)</p> Signup and view all the answers

What is the main function of small veins?

<p>Transport blood from arterioles to small veins (C)</p> Signup and view all the answers

What is the composition of capillaries?

<p>Composed of endothelium resting on connective tissue (A)</p> Signup and view all the answers

What do elastic arteries prevent when ventricles are relaxed?

<p>Blood pressure from falling down (D)</p> Signup and view all the answers

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